Pool towel racks are great to dry out wet but perfectly clean towels so they can be used again later in the day or stored away with your supply of beach/pool towels. Make one yourself for a few bucks in PVC components using plans from eHow.

Basically you need two T-connections and two U-connections and various feet of PVC piping. Use PVC cement on most of the connections, but you'll want to leave a few strategically uncemented to easily put the rack away when you close down the pool.

Full instructions and a materials list can be found at the source link below. Photo by PVC Workshop